Zobrazeno 1 - 10
of 12
pro vyhledávání: '"T. A. Knuuttila"'
Publikováno v:
Journal of Low Temperature Physics. 126:139-144
We present our first high resolution vibrating wire resonator data on dilute 3He-4He mixtures at ultra low temperatures. Measurements were performed at saturated vapor pressure with 3He concentrations below the phase separation limit. The behavior of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be184a81ecb8fe0900401b3ef059fd01
https://doi.org/10.1023/a:1013735421595
https://doi.org/10.1023/a:1013735421595
Publikováno v:
Journal of Materials Science. 36:839-844
We present a systematic investigation of conditions for heat treatment of Rh with the aim of increasing the residual resistivity ratio (RRR). The maximal value of RRR for a 25 μm thick foil was found to be 1050 and the optimal treatment conditions w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b02778ca7d049ed414df7fd77ed9fd6a
https://doi.org/10.1023/a:1004874412227
https://doi.org/10.1023/a:1004874412227
Publikováno v:
Journal of Low Temperature Physics. 123:65-102
We performed SQUID-NMR measurements on a rhodium single crystal at ultra-low nuclear-spin temperatures. With initial polarizations up to p=0.95, the antiferromagnetic tendency was clear, but surprisingly no indication of actual nuclear magnetic order
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b43fd9aeda9d7de62759815444555af
https://doi.org/10.1023/a:1017545531677
https://doi.org/10.1023/a:1017545531677
Publikováno v:
Journal of Low Temperature Physics. 124:271-289
The nuclear spin system of Rh metal has recently been investigated experimentally. No nuclear magnetic ordering was observed in these measurements, in spite of the very low nuclear entropy achieved. To study this system theoretically, we have applied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::add52ba3709a407c9b31d82eb4e2cc5e
https://doi.org/10.1023/a:1017542305493
https://doi.org/10.1023/a:1017542305493
Publikováno v:
Physical Review Letters. 85:2573-2576
Nuclear spin lattice relaxation rates were measured in normal and superconducting (sc) rhodium with nuclear polarizations up to p = 0. 55. This was sufficient to influence the sc state of Rh, whose T(c) and B(c) are exceptionally low. Because B(c)<
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c85377fd12303825c37595f948d10782
https://doi.org/10.1103/physrevlett.85.2573
https://doi.org/10.1103/physrevlett.85.2573
Autor:
T. A. Knuuttila, Juha Tuoriniemi
Publikováno v:
Physica B: Condensed Matter. 280:474-478
The lowest temperatures ever measured have been produced by cascade adiabatic nuclear demagnetization of copper and rhodium. Ultimately, spontaneous antiferromagnetic ordering of rhodium nuclei is anticipated. High-sensitivity SQUID-NMR measurements
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc79d5153976c73743a6638ebfa2ef39
https://doi.org/10.1016/s0921-4526(99)01839-6
https://doi.org/10.1016/s0921-4526(99)01839-6
Publikováno v:
Journal of Low Temperature Physics. 120:121-150
A new cascade nuclear demagnetization cryostat has been designed and constructed. Our aim was to build a versatile, modular cryostat, with a large experimental space providing an excellent platform for various types of ultralow temperature measuremen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d300311ae71e6dca218cf99ac28b6d66
https://doi.org/10.1023/a:1004665020659
https://doi.org/10.1023/a:1004665020659
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 3:224-228
We investigate electron thermalization of tunnel junction arrays installed in a powerful dilution refrigerator whose mixing chamber can produce lattice temperatures down to 3 mK. The on-chip Coulomb blockade thermometers (CBT) against other thermomet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d462e3d4c9bb4da46fb51c2f2979819
https://doi.org/10.1016/s1386-9477(98)00207-0
https://doi.org/10.1016/s1386-9477(98)00207-0
Publikováno v:
Physical Review Letters. 91
Using Corbino samples we have observed oscillatory dc conductance in a high-mobility two-dimensional electron system when it is subjected to crossed microwave and magnetic fields. At the strongest of the oscillation minima the conductance is found to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca9233097f68484757762bccc73afa95
https://doi.org/10.1103/physrevlett.91.096803
https://doi.org/10.1103/physrevlett.91.096803
Publikováno v:
University of Copenhagen
Sensitive SQUID-NMR measurements were used to study the mutual interactions in the highly polarized nuclear-spin system of rhodium metal. The dipolar coupling gives rise to a weak double-spin-flip resonance. The observed frequency shifts allow deduci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16aa49f7ad67798df99785338aea3a2f
https://pubmed.ncbi.nlm.nih.gov/11015913
https://pubmed.ncbi.nlm.nih.gov/11015913